Finding the Fourth Proportional to 118,929.43, 164,208.72 and 76,561.77

Step by Step Solution

1. Step 1: Write the proportion equation
   118,929.43 : 164,208.72 = 76,561.77 : x
2. Step 2: Convert to fraction form
   118,929.43/164,208.72 = 76,561.77/x
3. Step 3: Cross multiply
   118,929.43x = 164,208.72 × 76,561.77
4. Step 4: Simplify right side
   118,929.43x = 12,572,109,869.83
5. Step 5: Solve for x
   x = 12,572,109,869.83/118,929.43
6. Step 6: Final answer
   x = 105,710.67